luci-app-filemanager: Full featured File Manager application for LuCI

luci-app-filemanager: Full featured File Manager application for LuCI

- Navigation in resizable window
- Scrollable and sortable list of files with name, type, creation
date/time columns
- Directory and files creation/renaming/removing
- Directory and files attributes changing
- Duplicating any object in the current directory
- Selecting objects individually and everything for removing selected
- Inverting selection with alt-click
- Large files uploading/downloading
- Drag'n'Drop multiple files from local directory to server
- Large files editing
- Line numbers toggle in editing window
- HEX mode for editing/viewing
- ASCII, HEX and RegExp search in HEX mode
- Storage of interface settings in config file
- Help tab with a short manual

Signed-off-by: Dmitry R <redacted>
Added timeout to info type addNotification so UI does not flood
synced i18n
Signed-off-by: Paul Donald <redacted>